Define the nature of matter.

(N/A) Anything that has mass and occupies space is called matter. For example,a book,pen,pencil,water,air,and all living beings are composed of matter because they possess mass and occupy space.
The matter can be classified into two categories:
$(i)$ According to physical state (solid,liquid,gas).
$(ii)$ According to chemical state (elements,compounds,mixtures).